UC3844AD8

{
  "slug": "uc3844ad8",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments AC-DC Controllers And Regulators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power management (pmic)",
    "uc3844ad8",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
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    "README.md",
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    "uc3844ad8.kicad_mod",
    "uc3844ad8.glb",
    "uc3844ad8.step",
    "uc3844ad8.lbr",
    "docs/hero.png",
    "docs/uc3844ad8-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "uc3844ad8-hero.glb",
    "uc3844ad8-hero.overlay.json",
    "uc3844ad8-etched.glb"
  ],
  "component": {
    "mpn": "UC3844AD8",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Power Management (PMIC)",
    "subcategory": "AC-DC Controllers And Regulators",
    "datasheet": "https://www.ti.com/lit/ds/symlink/uc3844a.pdf",
    "parts": {
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      "footprint": "uc3844ad8.kicad_mod",
      "model_3d": "uc3844ad8-hero.glb",
      "model_3d_plain": "uc3844ad8-etched.glb",
      "model_3d_step": "uc3844ad8-etched.step",
      "model_3d_step_plain": "uc3844ad8.step",
      "lbr": "uc3844ad8.lbr"
    },
    "distributor_links": {
      "lcsc": "C133841",
      "digikey": "296-11290-5-ND",
      "mouser": "595-UC3844AD8"
    },
    "distributor_check": {
      "checked_at": "2026-11-05T22:33:11Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-11290-5-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-UC3844AD8",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "COMP",
        "type": "output",
        "description": "Output of the low-impedance 1-MHz internal error amplifier, which is also the input to the peak current limit/PWM comparator, with open-loop gain of 80 dB; it can sink a maximum of 6 mA and is not internally current limited."
      },
      {
        "number": "2",
        "name": "FB",
        "type": "input",
        "description": "Input to the error amplifier that can be used to control the power converter voltage-feedback loop for stability."
      },
      {
        "number": "3",
        "name": "ISENSE",
        "type": "input",
        "description": "Input to the peak current limit and PWM comparator, where the maximum peak current sense signal is internally clamped to 1 V."
      },
      {
        "number": "4",
        "name": "RT/CT",
        "type": "input",
        "description": "Input to the internal oscillator programmed by an external timing resistor (RT) and timing capacitor (CT); TI recommends CT from 470 pF to 4.7 nF and RT from 5 kΩ to 100 kΩ."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "This is the controller signal ground."
      },
      {
        "number": "6",
        "name": "OUTPUT",
        "type": "output",
        "description": "Output of the 1-A totem-pole gate driver that can sink and source up to 1 A of gate driver current, and a gate driver resistor must be used to limit that current."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Bias input to the gate driver, which must have a biasing capacitor at least 10 times greater than the gate capacitance of the main switching FET used in the design."
      },
      {
        "number": "8",
        "name": "VREF",
        "type": "power_in",
        "description": "Reference voltage output that must supply no more than 10 mA under normal operation, is short-circuit protected at roughly 100 mA, and needs a 1 µF high-frequency bypass capacitor."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Datasheet Table 4-1 lists VCC as type I (input). It is typed power_in here because it is the supply "
        ],
        "pages_sent": 17,
        "cost_usd": 0.028,
        "at": "2026-11-05T22:33:03"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/uc3844a.pdf",
        "pages": 55,
        "sha256": "e255958b7704edfb",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
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        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-11-05",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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      {
        "file": "uc3844ad8-etched.step",
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}